A Pitch Controller Realized on the Basis of Inner Model PID

In this thesis, based on the analysis on the transform processes of wind energy and electric energy, considering the characteristics as the complexity of the mathematical model for the wind power generating system, strong time-varying volatility, the existence of coupling between parameters, the severity of disturbance from the environment and the difficulty of realizing the controllers etc, by Inner Model Theory, a straightforward inner model PID method in which the design of system controllers can be realized by only adjusting filtering time constant is analyzed and provided, and this not only enables the system to be independent from exact models of the controlling object on design and thus dissolved a coupled relation between parameters but simplifies the realization of the control method, and meanwhile, a composition of a control system of a wind power pitch, which is based on inner model PID is given. At last, the simulation result of MATLAB shows: this control scheme is feasible and can keep the output power of a wind driven generator best, and the robustness of the system is good, the anti-interference is powerful, and also provides a reference for the complex control system design of the industrial process.